SWXJ9 female mice develop ovarian granulosa cell carcinomas with an incidence of approximately 12% and a latency of 4-6 weeks. Tumor incidence can be increased to approximately 40% by treatment with dehydroepiandrosterone (DHEA) or testosterone immediately after weaning. Treatment with estradiol during this period completely suppresses tumorigenesis. Neoplasias are first observed as hemorrhagic follicles in which the antrum is blood-filled and lined with irregular masses of proliferating granulosa cells. By 6-10 weeks of age, the primary tumor encompasses the entire ovary. Metastases to lung, renal node, and liver are common by 6 to 9 months of age, with other sites occasionally affected. Susceptibility to granulosa cell carcinomas is controlled by a small number of genes, including a major susceptibility locus on Chromosome 4 and a major modifier locus on the X chromosome.
Currently there are no related genes or alleles for this strain.